lib/session_handler.inc.php

   1 <?php
   2 /* vim: set ts=4 tw=0 sw=4 noet: */
   3 require_once $CFG->root .'config.php';
   4
   5 class FileSessionHandler {
   6     private $savePath;
   7     private $log_level;
   8     private $log_method;
   9
  10     public function __construct() {
  11         global $CFG;
  12
  13         if (isset($CFG->log_level)) {
  14             $this->log_level = $CFG->log_level;
  15         } else {
  16             $this->log_level = 1;
  17         }
  18
  19         if (isset($CFG->log_method)) {
  20             $this->log_method = $CFG->log_method;
  21         } else {
  22             $this->log_level = 'syslog';
  23         }
  24
  25         $this->log("Init FileSessionHandler", 4);
  26
  27     }
  28
  29     private function log($message, $level = 1) {
  30         global $CFG;
  31
  32         if ($level > $this->log_level)
  33             return;
  34
  35         $time = date('c');
  36
  37         $priority = LOG_INFO;
  38         switch ($level) {
  39             case 1: $priority = LOG_ERR; break;
  40             case 2: $priority = LOG_WARNING; break;
  41             case 3: $priority = LOG_INFO; break;
  42             case 4: $priority = LOG_DEBUG; break;
  43         }
  44
  45         switch ($this->log_method) {
  46             case 'file':
  47                 if (isset($CFG->log_file)) {
  48                     if ($CFG->log_file[0] == '/') {
  49                         $file = $CFG->log_file;
  50                     } else {
  51                         $file = $CFG->root.$CFG->log_file;
  52                     }
  53                 } else {
  54                     $file = $CFG->root.'qtadmin.log';
  55                 }
  56                 file_put_contents($file, "[$time]: $message\n", FILE_APPEND | LOCK_EX);
  57                 chmod($file, 0600);
  58                 break;
  59             case 'stderr':
  60                 file_put_contents('php://stderr', "[$time]: $message\n");
  61                 break;
  62             case 'syslog':
  63                 syslog($priority, $message);
  64                 break;
  65         }
  66     }
  67
  68     public function open($savePath, $sessionName) {
  69         $this->log("FileSessionHandler->open", 4);
  70         $this->savePath = $savePath;
  71         if (!is_dir($this->savePath)) {
  72             mkdir($this->savePath, 0777);
  73         }
  74
  75         return true;
  76     }
  77
  78     function close() {
  79         $this->log("FileSessionHandler->close", 4);
  80         return true;
  81     }
  82
  83     function read($id) {
  84         return (string)@file_get_contents("$this->savePath/qt_sess_$id");
  85     }
  86
  87     function write($id, $data) {
  88         $this->log("FileSessionHandler->write : $id->$data", 4);
  89         $result = file_put_contents("$this->savePath/qt_sess_$id", $data);
  90         chmod("$this->savePath/qt_sess_$id", 0600);
  91
  92         return ($result === false) ? false : true;
  93     }
  94
  95     function destroy($id) {
  96         $this->log("FileSessionHandler->destroy : $id", 4);
  97         $file = "$this->savePath/qt_sess_$id";
  98         if (file_exists($file)) {
  99             unlink($file);
 100         }
 101
 102         return true;
 103     }
 104
 105     function gc($maxlifetime) {
 106         $this->log("FileSessionHandler->gc : $maxlifetime", 4);
 107         foreach (glob("$this->savePath/qt_sess_*") as $file) {
 108             if (filemtime($file) + $maxlifetime < time() && file_exists($file)) {
 109                 unlink($file);
 110             }
 111         }
 112
 113         return true;
 114     }
 115 }
 116
 117 $handler = new FileSessionHandler();
 118 session_set_save_handler(
 119     array($handler, 'open'),
 120     array($handler, 'close'),
 121     array($handler, 'read'),
 122     array($handler, 'write'),
 123     array($handler, 'destroy'),
 124     array($handler, 'gc')
 125 );
 126
 127 // the following prevents unexpected effects when using objects as save handlers
 128 register_shutdown_function('session_write_close');
 129 ?>